content: /**
   * Alipay.com Inc.
   * Copyright (c) 2004-2020 All Rights Reserved.
   */
  package com.alipay.easysdk.kernel.util;
  
  import java.util.Map;
  import java.util.Map.Entry;
  
  /**
   * 生成页面信息辅助类
   *
   * @author zhongyu
   * @version : PageUtil.java, v 0.1 2020年02月12日 3:11 下午 zhongyu Exp $
   */
  public class PageUtil {
      /**
       * 生成表单
       *
       * @param actionUrl  表单提交链接
       * @param parameters 表单参数
       * @return 表单字符串
       */
      public static String buildForm(String actionUrl, Map<String, String> parameters) {
          return "<form name=\"punchout_form\" method=\"post\" action=\""
                  + actionUrl
                  + "\">\n"
                  + buildHiddenFields(parameters)
                  + "<input type=\"submit\" value=\"立即支付\" style=\"display:none\" >\n"
                  + "</form>\n"
                  + "<script>document.forms[0].submit();</script>";
      }
  
      private static String buildHiddenFields(Map<String, String> parameters) {
          if (parameters == null || parameters.isEmpty()) {
              return "";
          }
          StringBuilder builder = new StringBuilder();
          for (Entry<String, String> pair : parameters.entrySet()) {
              // 除去参数中的空值
              if (pair.getKey() == null || pair.getValue() == null) {
                  continue;
              }
              builder.append(buildHiddenField(pair.getKey(), pair.getValue()));
          }
          return builder.toString();
      }
  
      private static String buildHiddenField(String key, String value) {
          StringBuilder builder = new StringBuilder(64);
          builder.append("<input type=\"hidden\" name=\"");
          builder.append(key);
          builder.append("\" value=\"");
          //转义双引号
          String a = value.replace("\"", "&quot;");
          builder.append(a).append("\">\n");
          return builder.toString();
      }
  }